<!DOCTYPE html>
<html lang="en">
    <head>
        <title>Font</title>
        <style>
            div{
                border: 3px dashed gray;
                font-family:Arial,sans-serif;
                font-size: 40px;
                font-weight: bold;
            }
        </style>
    </head>
    <body>
        <div>
            Hello,world!
        </div>
        some more texts
    </body>
</html>